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TREASURY STOCK PURCHASE (Details) (USD $)
In Millions, except Share data, unless otherwise specified
 0 Months Ended 3 Months Ended 12 Months Ended
Apr. 07, 2013
Mar. 31, 2014
Dec. 31, 2013
TREASURY STOCK PURCHASE      
Number of shares repurchased of common stock from employees in lieu of cash or withholding taxes due   281  
Cash payment for repurchase of common stock from employees in lieu of cash or withholding taxes due   $ 0.02  
April 2013 Repurchase Plan
      
TREASURY STOCK PURCHASE      
Maximum amount of common stock the board of directors authorized to repurchase 200.0    
Common stock repurchased (in shares)   0 951,000
Average purchase price (in dollars per share)     $ 56.98
Common stock repurchased     $ 54.2